'use strict'

const path = require('path')

module.exports = {
  dev: {// dev 环境
    // Paths
    assetsSubDirectory: 'static',// 编译输出的二级目录
    assetsPublicPath: '/',// 编译发布的根目录，可配置为资源服务器域名或 CDN 域名
    //跨域设置
    proxyTable: {// 需要 proxyTable 代理的接口（可跨域）
      '/api': {
        target: 'http://localhost:3000',
        changeOrigin:true,
        pathRewrite: {
          '^/api': '/mysql'
        }
      }
    },
    // Various Dev Server settings
    host: 'localhost', // can be overwritten by process.env.HOST
    port: 8181, // can be overwritten by process.env.HOST, if port is in use, a free one will be determined
    autoOpenBrowser: true,
    errorOverlay: true,
    notifyOnErrors: true,
    poll: false, // https://webpack.js.org/configuration/dev-server/#devserver-watchoptions-

    // Use Eslint Loader?
    // If true, your code will be linted during bundling and
    // linting errors and warnings will be shown in the console.
    useEslint: true,
    // If true, eslint errors and warnings will also be shown in the error overlay
    // in the browser.
    showEslintErrorsInOverlay: false,

    /**
     * Source Maps
     */

    // https://webpack.js.org/configuration/devtool/#development
    devtool: 'source-map',//cheap-module-eval-source-map

    // If you have problems debugging vue-files in devtools,
    // set this to false - it *may* help
    // https://vue-loader.vuejs.org/en/options.html#cachebusting
    cacheBusting: true,

    // CSS Sourcemaps off by default because relative paths are "buggy"
    // with this option, according to the CSS-Loader README
    // (https://github.com/webpack/css-loader#sourcemaps)
    // In our experience, they generally work as expected,
    // just be aware of this issue when enabling this option.
    cssSourceMap: true,// 是否开启 cssSourceMap
  },

  build: {  // production 环境
    // Template for index.html
    index: path.resolve(__dirname, '../dist/index.html'),// 编译输入的 index.html 文件

    // Paths
    assetsRoot: path.resolve(__dirname, '../dist'),// 编译输出的静态资源路径
    assetsSubDirectory: 'static', // 编译输出的二级目录
    assetsPublicPath: './',// 编译发布的根目录，可配置为资源服务器域名或 CDN 域名

    /**
     * Source Maps
     */

    productionSourceMap: true,// 是否开启 cssSourceMap
    // https://webpack.js.org/configuration/devtool/#production
    devtool: '#source-map',

    // Gzip off by default as many popular static hosts such as
    // Surge or Netlify already gzip all static assets for you.
    // Before setting to `true`, make sure to:
    // npm install --save-dev compression-webpack-plugin
    productionGzip: false,// 是否开启 gzip
    productionGzipExtensions: ['js', 'css'],// 需要使用 gzip 压缩的文件扩展名

    // Run the build command with an extra argument to
    // View the bundle analyzer report after build finishes:
    // `npm run build --report`
    // Set to `true` or `false` to always turn it on or off
    bundleAnalyzerReport: process.env.npm_config_report
  }
}
